Wheel for road-vehicles.



BIO-AS31879.

PATENTED SEPT. 25, 1906.

G. s. OGILVIE.

WHEEL FOR ROAD VEHICLES.

APPLIOATIOH TILED HA3. 7, 1905.

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WHEEL FOR ROAD VEHICLES. APPLICATION FILED MAB. '1, 1905.

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PA'TENTED SEPT. 25,1906.

UNITED STATES PATENT OFFICE.

WHEEL FOR ROAD-VEHICLES- Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed March 7, 1905. Serial No. 248,934:-

TO all 70/210711 it may concern.-

Be it known that I, GLENOAIRN STUART OGILVIE, a subject of the King of Great Britain, whose post-office address is The Lodge, Woodbridge, in the county of Suffolk, England, have invented certain new and useful Improvements of which the following is a specification.

This invention relates to wheels for road or other vehicles of the kind in which the rim and felly are not rigidly connected with each other, but have interposed between them a spring-cushion or spring-cushions by which a certain resiliency is obtained and are correlated for driving purposes by means of stops or drivers on the rim and felly, respectively. In such wheels it is advisable, as described in my United States Patent No. 7 82,518, dated February 14, 1905, and in my pending application, filed on June 28, 1904, Serial No. 214,491, that the two members of the wheel should have a relative circumferential freedom at least equal to their maximum relative radial freedom. Since owing to the eccentricity of the rim and felly under ordinary running conditions each set of driving-stops is in engagement during a part only of each revolution, it Will be obvious that there will be a constant succession of impact shocks of the driving-stops, and although these shocks may be inappreciable when running on a smooth road they may become serious or objectionable when the driving-motor is work ing on a heavy load or against a resistance which varies suddenly.

By the present invention subsidiary bufferstops are provided on one or other of the wheel members, which are so arranged that while they allow a free relative circumferential movement equal to the maximum radial movement of the rim and felly they come into engagement with the driving-stops of the other member in advance of the engagement of the princip al or p ositive driving-stops therewith and by the yielding resistance which they offer eliminate or reduce the shock of the impact of the main driving-stops. Such a device is particularly desirable and, in fact, is an absolute necessity in practice in the case of wheels in which, as in those constructed according to the present invention, the resilient cushions interposed between the rim and felly are so constructed or mounted as to minimize the frictional resistance to the relative circumferential movement of these two members and to reduce the shearing stresses in lVheels for Road-Vehicles, i

to which these resilient cushions may be subjected.

In the accompanying drawings, Figure 1 is a side elevation with the dust-covers removed of a driving-wheel constructed according to the present invention, showing the various parts in the relative positions which they would occupy when the resilient supporting-cushions are under maximum compression, as when the wheel is surmounting a considerable obstacle. Fig. 2 is a similar view, but with the two wheel members coaxial and showing the attachment of the dust-covers. Fig. 3 is a part-sectional side elevation, on an enlarged scale, showing the buffer-stops and the manner of mounting the resilient cushions. Figs. 4 and 5 are part transverse sections on lines 4 4 5 5, respectively, of Fig. 3. Fig. 6 is a plan view looking from the hub of the buffer-stops. Figs. 7 and 8 are transverse sections on lines 7 7 8 8, respectively, of Fig. 3. Figs. 9 and 10 are respectively a part side elevation and a part plan view looking from the hub of a modified bufier-stop construction, and Figs. 11 and 12 are corresponding views of another modified buffer-stop.

The felly a is surmounted by a band of steel or other suitable wear-resisting material b and has on each side driving-plates 0, preferably four, which are secured by bolts or rivets c and preferably dovetailed into the edges of the band b, as shown at 0 The felly driving-stops consist of pins (1, passing through the felly and plates 0 and extending outward beyond the latter to engage one on either side of the twin driving-horns e, which extend inwardly from rim driving-plates e, suitably secured on the wooden rim f, as by means of bolts or rivets and by dovetailing the plates 0, as at 6 in the edges of the metal tread f surmounting the rim.

The resilient cushions interposed between rim and felly consist of segmental blocks g of solid or cored india-rubber or the like or pneumatic cushions or springs and are mounted on shoes h, which may be of metal or other suitable material and are mounted to slide within the range imposed by limitingstops on the felly-b and b, to which a suitable lubricant may be applied, so as to reduce the friction as much as possible. In the construction illustrated the shoes h are turned up at the ends to retain the cushions g, preferably wired thereto, as shown, and have lateral projections h, adapted to engage the rim and felly, plates 7c, either side able therefrom suitably placed and secure I y and preferably detachat least on one side, serve as retaining-guides for With wheels such ing a certain free rel the rim and felly it of the fell as herein set forth.

the shoes 7t.

overcome or other cause may result in a rapid relative circumfere rim and felly felly-stops with which they cooperate, and

more particularly is this means of the antifriction resilient cushions descri is enabled to rotate wi a limited range withi even when the cushions are in considerable compression between t der such conditions, t be subject to shocks driving-horns with their cooperating stops,

and to obviate these there are mounted on the wheel subsidiary yielding resistance main or positive driving-stops, and thereby of impact between the lat- In the construction of Figs. 1 to 8 these onsist of buffer-arms 'm, seof transverse pins n, which brackets 0, fastened by screws or bolts 0 to the felly. The arms m reduce the shock ter.

subsidiary stops 0 cured at each end are ournaled in to the engagement of the are mounted. so as to come into engagement with the driving-ho counter the main driving-stops d of the folly. The pin n is thereby turned in its bearings,

and. a spring p is thereb gagement with another the pin n. When the bu arm m, secured to engagement with the driving-horns, they are maintained in the spring a definite posi p, which bein pression against the arm wardly-projecting end of the ment against the sole of the bracket 0.

The buffer-arms are m tance apart wh total clearance of the resilient horns is at least equal to the edom under full compression cushions between the run and stops being greater than that between the buffer-stops by such an amount that engagement between the mai cooperating driving-horns will ensue before the springs p are fully compressed. The

horns 6, so as to limit the he cushions round the wheel compression, it being essenat such limitation should in with the relative freedom of Stopd on as herein described havative movement between may frequently happen that a sudden change in the resistance to be ntial movement of the and a correspondingly violent encounter between one or more of the rim driving-horns and one or the other of the the case when by al mounting of the bed above the felly th freedom through 11 the cushion-shoes he rim and felly. Unherefore, the wheel will due to the impact of the buffer-stops which offer rns 6 before the latter en y compressed by enfer-arms are not in tion by means of g slightly in com holds the rearlatter in abutounted at such a disen not in engagement that the between them and the cooperating drivingtotal radial fre n felly-stops and their springs p would preferably be designed to transmit a considerable proportion, up to as much as one-third or even more, of the m aximum driving effort; but lighter springs would be substituted therefor if it were desired to eliminate the small oscillatory impact-shocks between the stops which may occur under ordinary running conditions, or a combination of a light spring and a powerful spring may be employed, the light spring being arranged. to come into action first. In any case, however, the buffer-arms should be spaced to fulfil the condition above set forth.

In the modified construction of Figs. 9 and 10 the rim driving-horns 6 before engaging with the felly-stops d encounter the outwardprojecting ends of plates 7", which are pivotally mounted on radial pins 7" within the felly and are closed inwardly against the action of transverse springs 8, having followerplates 8, mounted to slide in transverse guides twithin the felly.

In the modification shown in Figs. 11 and 12 the felly-stops d are mounted in circumferential slots (1 in the felly, being normally held against the inner ends of these slots by tension-springs u. These slots are spaced, as in the other constructions, so that the total clearance between the driving-horns and their felly-stops in the normal position is equal to the total radial freedom between rim and felly. lVhen the driving-horns encounter the felly-stops, the latter are displaced in their grooves against the increased tension of the springs to and the compression of the springs 12, connected to the operating felly-stops, until they are pressed against the farther end of the slot when the drive becomes a positive one between rigid stops.

Dust-covers w are removably mounted on the wheel-rim, being secured in position thereon by means of the studs :2: on the outer faces of the driving-horns and the spring-arms g, which en age over the studs w, as shown in Fig. 2 of t e drawings. 1 10 It will be obvious that instead of springbufl'ers, such as are herein described and illustrated, any usual equivalents may be substitued thereforas, for example, india-rubber buffers or pneumatic buffers-without extending the scope of the present invention. Further, instead of facilitating the sliding of the resilient cushions on the felly of the wheel the antifrictiolrshoe might be dispensed on the outer face of the cushions, preferably in this case secured to the felly, so as to enable them to slide easily on the rim,- but the other arrangement is usually preferable.

Having thus described the nature of my said invention and the best means I know of carrying the same into practical effect, I claim- 1. In wheels for road or other vehicles such as herein described, resilient cushions between the rim and felly mounted on sliding r 0 shoes, said cushions and shoes being free to move circumferentially with respect to said rim and felly, substantially as and for the purpose set forth.

2. In wheels for roador other vehicles having relatively movable rim and felly members, elastic cushions freely mounted between the said members and consistin of india-rubber blocks shod with metal on t e surface which contacts with the wheel-rim, and stops engaging the said metal shoes to limit thefree circumferential displacement of the elastic cushions, substantially as described.

3. In wheels for road or other vehicles having relatively movable rim and felly members, pairs of resilient buffer-stops mounted on one member and adapted to engage with drivingstops on the other member, said bufier-stops being spaced to give a total clearance between them and their cooperating drivingstops e ual to the total radial freedom, between t e two wheel members, substantially as described.

4. In wheels for road-vehicles having rela tively movable rim and felly members, resilient cushions supporting one member upon the other and provided with sliding shoes, and driving-stops on one member cooperating with rigid driving-stops on the second member and with resilient bufler-stops also on the second member, said buffer-stops being spaced to come into operation before the said rigid stops and also to allow an absolutely free but limited circumferential movement of the driving-stops on the first member, substantially as described.

5. In wheels for road or other vehicles having relatively movable rim and felly members, a plurality of stops on one member, each cooperating with a pair of yielding buffer-stops on the second member s aced to give a total clearance at least equa to the total radial play between the two members, andwith a pair of fixed stops also on the second member, said fixed stops being spaced to come into engagement with their cooperating drivingstops after the yieldin buffer-stops aforesaid, substantially as descrl ed.

6, In wheels for road or other vehicles having relatively movable rim and felly members, india-rubber cushions for supportin one member upon the other and provide with metal soles and freely mounted between the said members, a plurality of stops on one member, each cooperating with a pair of yielding buffer-stops on the second member spaced to give a total clearance at least equal to the total radial play between the two members, and with a pair of fixed stops also on the second member, said fixed stops being spaced to come into engagement with their cooperating driving-stops after the yielding buffer-stops aforesaid, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GLENCAIRN STUART OGILVIE.

Witnesses:

JOSEPH MILLARD, GEORGE ISAAC BRIDGES. 

